Whether in solar cells or in the human eye, whenever certain molecules absorb light, the electrons within them shift from their ground state into a higher-energy, excited state. This results in the transport of energy and charge, leading to charge separation and eventually to the generation of electricity.



Summary

Light absorption in specific molecules triggers a critical electron shift from a stable ground state to an energized, excited state. This fundamental process underlies energy and charge transport in systems ranging from solar cells to human vision. As electrons move to higher energy levels, they facilitate charge separation, a necessary step for converting light energy into other forms of energy, such as electricity. Ultimately, this excitation-driven charge movement allows for the harnessing and utilization of light’s energy.

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